The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2017
Filed:
May. 06, 2014
Applicant:
Nxp B.v., Eindhoven, NL;
Inventors:
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60R 25/24 (2013.01); H04W 4/00 (2009.01); H04L 29/08 (2006.01); H04W 88/08 (2009.01); H04W 24/08 (2009.01); G07C 9/00 (2006.01);
U.S. Cl.
CPC ...
B60R 25/245 (2013.01); G07C 9/00309 (2013.01); H04L 67/12 (2013.01); H04W 4/005 (2013.01); H04W 24/08 (2013.01); H04W 88/08 (2013.01); G07C 2209/63 (2013.01);
Abstract
A system and method of locating a key are disclosed. The key is configured to communicate with a base station through a plurality of antennas that are coupled to the base station. The method includes turning off each of the plurality of antennas, turning on one of the plurality of antennas, measuring a first received signal strength, turning off the one of the plurality of antennas and measuring a second received signal strength. The key is determined to be located within a predefined area if the difference between the first received signal strength and the second received signal strength is above a preset threshold.